Answer:
Step-by-step explanation:
(5+x)+12
Answer:
145 yards squared
Step-by-step explanation:
So the area of the base is area of a square with side length of 5 yards 
The area of one triangular face base times height divided by two and then simply multiplied by 4 because there are 4 triangular faces.

So the total surface area is
yards squared
Negative 1 / Square Root of 2
I am relatively sure the answer you are looking for is;
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